Blacklists Compared

14 July 2012

[ Fighting Spam | Dialup Zones | Blacklists Compared | Current Blacklist Comparison | Sendmail Configuration ]

Survey results for all known public IP-based DNS blacklists. Lookups were done on connecting IP addresses. The "union of most IP zones" line excludes the hostkarma.junkemailfilter.com (all results but 127.0.0.2, 127.0.0.3, and 127.0.0.4), exemptions.ahbl.org, query.bondedsender.org, list.dnswl.org, accredit.habeas.com, iadb.isipp.com, iadb2.isipp.com, swl.spamhaus.org, and wl.mailspike.net zones because they are not blacklists. Because they are too aggressive to be widely useful the spam.dnsbl.sorbs.net and l2.apews.org zones are also excluded from the union.

HitsDNS Zone
62286(total number of IP addresses tested, including 179 at SDSC)
58511(union of most IP zones)
49241zen.spamhaus.org (union of all results)
49224b.barracudacentral.org
45535ip.v4bl.org
40961cbl.abuseat.org
40960zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
40889bl.mailspike.net (union of all results)
40599bl.tiopan.com
32911zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
32578hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
30206dnsbl-1.uceprotect.net
29789hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
28955bl.mailspike.net (result 127.0.0.12 = bad reputation)
25740dnsbl-3.uceprotect.net
25421dnsbl-2.uceprotect.net
23354all.spamrats.com (union of all results)
19874bl.spameatingmonkey.net
18099dnsbl.sorbs.net (union of all results)
16819psbl.surriel.com
16295ubl.unsubscore.com
15039spam.dnsbl.sorbs.net
14057all.spamrats.com (result 127.0.0.36 = dialup)
11917dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10843truncate.gbudb.net
9230bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
9138wl.mailspike.net (union of all results) (not a blacklist!)
9118bl.mailspike.net (result 127.0.0.11 = very bad reputation)
9035all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
7365zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
7008dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6823dnsbl.inps.de
6504list.dnswl.org (not a blacklist!)
5879wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
5392db.wpbl.info
4299bl.spamcop.net
2982hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2801ix.dnsbl.manitu.net
2597hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2513wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2167ips.backscatterer.org
1598hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1568bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
1556hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1366tr.countries.nerd.dk
1207bl.spamcannibal.org
1127spamsources.fabel.dk
1047bl.score.senderscore.com
1000zen.spamhaus.org (union of SBL and SBLCSS results)
753accredit.habeas.com (not a blacklist!)
740korea.services.net
617query.bondedsender.org (not a blacklist!)
540zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
504wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
460zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
423mail-abuse.blacklist.jippg.org
415all.spamrats.com (result 127.0.0.38 = spam source)
357dnsbl.njabl.org (union of all results)
327all.s5h.net
315dnsbl.njabl.org (result 127.0.0.9 = open proxy)
303l2.bbfh.ext.sorbs.net
243wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
243iadb.isipp.com (not a blacklist!)
240aspews.ext.sorbs.net
231hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
196dnsbl.ahbl.org (union of all results)
140dnsbl.ahbl.org (result 127.0.0.4 = spam source)
82iadb2.isipp.com (not a blacklist!)
63dnsbl.sorbs.net (result 127.0.0.6 = spam source)
54dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
54dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
54dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
36dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
24dnsbl.njabl.org (result 127.0.0.2 = open relay)
21tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
21tor.dnsbl.sectoor.de (union of all results)
20dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
18dnsbl.njabl.org (result 127.0.0.4 = spam source)
12hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
8multi.surbl.org
5bl.deadbeef.com
5swl.spamhaus.org (union of all results) (not a blacklist!)
3swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
3spamguard.leadmon.net (union of all results)
2dnsbl-0.uceprotect.net
2swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1multi.uribl.com (union of all results)
Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
62286(total number of IP addresses whose names were tested, including 179 at SDSC)
35632hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
29518hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
23765(union of most domain zones)
19578abuse.rfc-ignorant.org
9311whois.rfc-ignorant.org (union of all results)
7244whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4719hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2827hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2070whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
616hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
477hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
409dbl.spamhaus.org (result 127.0.1.2 = spam source)
409dbl.spamhaus.org (union of all results)
390hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
171urired.spameatingmonkey.net
130hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
62rhsbl.ahbl.org
43fresh.spameatingmonkey.net
42hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
40postmaster.rfc-ignorant.org
33bogusmx.rfc-ignorant.org
25multi.surbl.org
18multi.uribl.com (result 127.0.0.2 = spam resource)
18multi.uribl.com (union of all results)
6dob.sibl.support-intelligence.net
3dsn.rfc-ignorant.org (zone not intended for this use)
3hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2bl.deadbeef.com
Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
37690(total number of domains tested, including 143 at SDSC)
32455hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7736(union of most domain zones)
3906hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3642whois.rfc-ignorant.org (union of all results)
3509whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2095hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2003hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1811hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1456dbl.spamhaus.org (result 127.0.1.2 = spam source)
1456dbl.spamhaus.org (union of all results)
1395abuse.rfc-ignorant.org
1281hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
829multi.surbl.org
771bogusmx.rfc-ignorant.org
731postmaster.rfc-ignorant.org
715multi.uribl.com (union of all results)
702multi.uribl.com (result 127.0.0.2 = spam resource)
370urired.spameatingmonkey.net
324hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
199dsn.rfc-ignorant.org
133whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
122dob.sibl.support-intelligence.net
22hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
17rhsbl.ahbl.org
15hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
11hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
4ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 17 July 2012.